Finding the Fourth Proportional to 1,865.91, 2,574.98 and 1,026.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.91 : 2,574.98 = 1,026.61 : x
2. Step 2: Convert to fraction form
   1,865.91/2,574.98 = 1,026.61/x
3. Step 3: Cross multiply
   1,865.91x = 2,574.98 × 1,026.61
4. Step 4: Simplify right side
   1,865.91x = 2,643,512.76
5. Step 5: Solve for x
   x = 2,643,512.76/1,865.91
6. Step 6: Final answer
   x = 1,416.74